With 16.7 seconds remaining in the second period, the eighth-ranked Marauders (12-7-5) took a 1-0 lead as senior captain Connor Dacey rifled a shot from the slot off senior Stevie Rizzuto’s feed to beat Waltham senior goalie Kyle Penton (20 saves) top-shelf.

“We’ve got a good coach,” said Miller. “He knows what he’s doing. He’s been there before. We’re just following him and riding him the whole way out.”

Division 1 North

Winchester 1, Newburyport 0 — Freshman Robert Di Vincenzo’s 10-save shutout performance led the seventh-seeded Sachems (15-7-2) to an upset win over the third-seeded Clippers (13-4-6) in the semifinals at the Tsongas Center. ‘‘The team played well,’’ said Di Vincenzo. ‘‘We got shots to the net. Defense played well. We didn’t give them too many opportunities. I didn’t see too many shots.’’ The Sachems surrendered one shot in the first period and took a 1-0 lead 47 seconds in when Ryan McCarthy found space in the slot and directed the puck past Ken Hodge (17 saves). Winchester allowed only four shots in the second and third periods. ‘‘We played good defensive hockey,’’ said Winchester coach Bill Burns.

Division 1 South

Braintree 3, Xaverian 2 — Down, 2-0, entering the third period in Bourne, the Wamps (11-6-6) rallied with three consecutive goals to advance to their third sectional final in five years. Seniors Shawn Leslie, Dara Canavan, and junior Aidan Flynn all scored for Braintree. ‘‘They’re never say die kids,’’ said Braintree coach Dave Fasano. ‘‘They haven’t stopped all year.’’ The Wamps survived a late onslaught from Xaverian (11-7-5) and face Marshfield in the sectional final Sunday at Gallo Arena.

Lenny Rowe for the Globe

Braintree celebrates its win over Xaverian.

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Marshfield 3, Needham 2 — Just a minute into the game, junior James Kolar opened the scoring for the Rams (14-5-6) in Bourne. Marshfield junior Kevin Buckley followed up with a long-range snipe late in the second period. The Rockets (12-8-3) responded with a goal by freshman Jack Kamke with seconds left in the period, but sophomore Max Burum had the dagger for the Rams with a heavy shot just outside the Needham crease late in the third period.

Division 2 South

Plymouth South 5, Canton 3 — Joey Van Winkle scored the go-ahead goal with 1:39 left in regulation to drive the Panthers (18-3-2) to the South final in Bourne. Senior Jake Worrick and sophomore Nicholas Gregg scored in the first 40 seconds, triggering a three-goal first period for Plymouth South. Daniel Lincoln completed the charge with a shorthanded goal at 8:02. Canton (17-3-4) responded, with sophomores Chris Lavoie and John Hagan connecting in the second period. With an extra attacker on, Hagan netted the equalizer with 1:53 remaining in the third. But 14 seconds later, Van Winkle answered with a quick wrister. Freshman Matt Smith hit the empty-netter for the Panthers, who will face the Medfield-Taunton winner in Sunday’s final at Gallo.